Drug interactions
Pazopanib + Saquinavir
Severity: Major
Pazopanib and Saquinavir: major interaction.
Last updated
For healthcare professionals — reference only. This page is a brief summary, not medical advice and not a substitute for official labeling or clinical judgement. Always verify before prescribing or dispensing.
Summary
Saquinavir inhibits CYP3A4 and may increase pazopanib exposure. Both drugs prolong the QT interval, so the combination raises the risk of torsades de pointes and other arrhythmias.
What this interaction means in plain words
Pazopanib and Saquinavir can interact in a way that may be serious. Using them together is sometimes necessary, but it needs a deliberate decision by the prescriber, a plan for monitoring, and clear advice on the warning signs to watch for.
Why it happens
CYP3A4 inhibition by saquinavir raises pazopanib levels, combined with additive QT prolongation.
What to do
Avoid the combination and select an alternative antiretroviral. If unavoidable, obtain a baseline ECG, correct electrolytes, monitor ECG periodically and consider a pazopanib dose reduction.
What to ask your pharmacist
- Does the benefit of taking both outweigh the risk in my case?
- Do I need any blood test, ECG or other check while on both?
- What early warning signs should I watch for, and what should I do if they appear?
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Other interactions of Pazopanib
- Adagrasib + Pazopanib Major
- Amiodarone + Pazopanib Major
- Amisulpride + Pazopanib Major
- Amobarbital + Pazopanib Major
- Anagrelide + Pazopanib Major
- Apalutamide + Pazopanib Major
Frequently asked questions
Can I take Pazopanib with Saquinavir?
MediHelp rates the interaction as major. Pazopanib and Saquinavir can interact in a way that may be serious. Using them together is sometimes necessary, but it needs a deliberate decision by the prescriber, a plan for monitoring, and clear advice on the warning signs to watch for. Saquinavir inhibits CYP3A4 and may increase pazopanib exposure. Both drugs prolong the QT interval, so the combination raises the risk of torsades de pointes and other arrhythmias.
How serious is the interaction between Pazopanib and Saquinavir?
MediHelp rates it major, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Avoid the combination and select an alternative antiretroviral. If unavoidable, obtain a baseline ECG, correct electrolytes, monitor ECG periodically and consider a pazopanib dose reduction.
What other medicines interact with Pazopanib?
MediHelp also lists interactions of Pazopanib with, for example, Adagrasib, Amiodarone, Amisulpride. The full list is on the Pazopanib page.
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